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<?php $arr =[ 0 => [ 'id' => 11, 'title' => 't1' ], 1 => [ 'id' => 12, 'title' => 't2' ] ]; $fianl_array = array_combine(array_column($arr,'id'),$arr); print_r($fianl_array);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Array ( [11] => Array ( [id] => 11 [title] => t1 ) [12] => Array ( [id] => 12 [title] => t2 ) )
preferences:
73.88 ms | 402 KiB | 91 Q